5611998 has 32 divisors (see below), whose sum is σ = 13144320. Its totient is φ = 1563840.

The previous prime is 5611997. The next prime is 5612029. The reversal of 5611998 is 8991165.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5611997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (410760).

Almost surely, 2^5611998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5611998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6572160).

5611998 is an abundant number, since it is smaller than the sum of its proper divisors (7532322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5611998 is a wasteful number, since it uses less digits than its factorization.

5611998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312.

The product of its digits is 19440, while the sum is 39.

The square root of 5611998 is about 2368.9655970486. The cubic root of 5611998 is about 177.7075321722.

The spelling of 5611998 in words is "five million, six hundred eleven thousand, nine hundred ninety-eight".